Fedora 11 Alpha includes a number of major features including Ext4 as default filesystem, A Windows cross compiler with dozens of libraries available in the repository, PackageKit Firmware support, experimental support for the next generation Btrfs filesystem, GNOME 2.26 development snapshot, KDE 4.2 RC 2 (general release available as an update), Xfce 4.6 Beta, Python 2.6 and more. Download it from here. The general release is targeted to be released at the end of May this year and will have many more enhancements available.